The ability to
hindcast the
detailed changes in atmospheric composition over the past decade, particularly the variability of tropospheric O3 and CO, is limited by the availability of measurements and their integration with
models and emissions data.
Let's look in more
detail at the paper's key figure, the one that looks at past and (forecast) future global temperatures, «
Hindcast / forecast decadal variations in global mean temperature, as compared with observations and standard climate
model projections» (click to enlarge)